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DuraVent B-Vent Increasers are used to increase the DuraVent B-Vent pipe. This is typically done when connecting two vent pipes together such as a hot water heater and a furnace which have different vent sizes. The small end of the increaser will be pointed down and the large side of the increaser will be pointing up the vent pipe.
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🇺🇸 Ship from USA · On Agora since 2025
$71.90